Siemens SINAMICS G120 Operating Instructions Manual page 404

Alarms, faults and system messages
8.5 Faults, alarm buffer and alarm history
Acknowledge fault
To acknowledge a fault, you have the following options:
● PROFIdrive control word 1, bit 7 (r2090.7)
● Acknowledging via a digital input
● Acknowledge via the Operator Panel
● Switch off the inverter power supply and switch on again
Faults detected during the inverter-internal monitoring of hardware and firmware can be
acknowledged only by switching the supply voltage off and on again. In the list of faults in the
List Manual, at the corresponding fault codes you may find the information on limitations when
acknowledging.
Fault history
Figure 8-4
If at least one of the fault causes in the fault buffer has been removed and you acknowledge
the faults, the following takes place:
1. The inverter shifts the values previously saved in the fault history by eight indexes.
The inverter deletes the faults that were saved in the indexes [56 ... 63] before the
acknowledgement.
2. The inverter copies the contents of the fault buffer to the memory locations [8 ... 15] in the
fault history.
3. The inverter deletes the faults that have been removed from the fault buffer.
The faults that have not been removed are now saved both in the fault buffer and in the
fault history.
4. The inverter writes the time of acknowledgement of the removed faults to "Fault time
removed".
The "Fault time removed" of the faults that have not been removed retains the value = 0.
The fault history can contain up to 56 faults.
Deleting the fault history
To delete all faults from the fault history, set parameter p0952 to zero.
404
Fault history after acknowledging the faults
Converter with the CU230P-2 Control Units
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257946B AE